| /* |
| * Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // Linda DeMichiel - Java Persistence 2.1 |
| // Linda DeMichiel - Java Persistence 2.0 |
| |
| package javax.persistence; |
| |
| import java.lang.annotation.Target; |
| import java.lang.annotation.Retention; |
| import static java.lang.annotation.RetentionPolicy.RUNTIME; |
| |
| /** |
| * Specifies that a unique constraint is to be included in |
| * the generated DDL for a primary or secondary table. |
| * |
| * <pre> |
| * Example: |
| * @Entity |
| * @Table( |
| * name="EMPLOYEE", |
| * uniqueConstraints= |
| * @UniqueConstraint(columnNames={"EMP_ID", "EMP_NAME"}) |
| * ) |
| * public class Employee { ... } |
| * </pre> |
| * |
| * @since Java Persistence 1.0 |
| */ |
| @Target({}) |
| @Retention(RUNTIME) |
| public @interface UniqueConstraint { |
| |
| /** (Optional) Constraint name. A provider-chosen name will be chosen |
| * if a name is not specified. |
| * |
| * @since Java Persistence 2.0 |
| */ |
| String name() default ""; |
| |
| /** (Required) An array of the column names that make up the constraint. */ |
| String[] columnNames(); |
| } |